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Q:

Meghana alone would take 32 hours more to complete a job than both Meghana and Ganesh together. If Ganesh worked alone, he took 12 1/2 hours more to complete it than both Meghana and Ganesh worked together. What time would they take if both Meghana and Ganesh worked together?

A) 20 hrs	B) 18 hrs
C) 22 hrs	D) 20.5 hrs

Answer & Explanation Answer: A) 20 hrs

Explanation:

Time taken by both Meghana and Ganesh to work together is given by =

$\sqrt{t_{1} x t_{2}}$

Where

$t_{1} = 32 h r s t_{2} = 12 \frac{1}{2} h r s = \frac{25}{2} h r s$

Therefore, time took by both to work together =

$\sqrt{32 x \frac{25}{2}} = \sqrt{16 x 25} = 4 x 5 = 20 h r s$

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Filed Under: Time and Work
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Q:

What is the goal of wildlife conservation?

A) protect nature	B) to maintain balance
C) to recognize the importance of wildlife	D) All of the above

Answer & Explanation Answer: D) All of the above

Explanation:

The main goal of wildlife conservation is to recognize the importance of wildlife and protecting the nature to maintain balance in the nature.

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Filed Under: Indian Geography
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Q:

Which was the only Indus site with an artificial brick dockyard?

A) Lothal	B) Dholka
C) Both A & B	D) None of the above

Answer & Explanation Answer: A) Lothal

Explanation:

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Filed Under: Indian Geography
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Q:

Ratio of water and milk in a container is 2 : 3. If 40 liter mixture removed from the container and same quantity of milk is added to it then the ratio of water to milk becomes 1 : 4. Find the initial quantity of mixture ?

A) 75 lit	B) 80 lit
C) 85 lit	D) 90 lit

Answer & Explanation Answer: B) 80 lit

Explanation:

From the given data,

let the initial quantity of the mixture = 5x

Then,

$\frac{2 x - 16}{3 x - 24 + 40} = \frac{1}{4} 8 x - 64 = 3 x + 16 5 x = 80 x = 16 lit$

Then the initial quantity of the mixture = 5x = 5 x 16 = 80 lit.

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Filed Under: Alligation or Mixture
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Q:

Suresh starts working as a analyst on an annual salary of Rs. 160000. If he receives a 15% pay-rise each year, the number of years he has worked for the company, when his annual salary became Rs. 279841 is

A) 3.5 yrs	B) 4 yrs
C) 4.5 yrs	D) 5 yrs

Answer & Explanation Answer: B) 4 yrs

Explanation:

From the given data in the question,

$279841 = 160000 x {(1 + \frac{15}{100})}^{t} \frac{279841}{160000} = {(\frac{115}{100})}^{t}$

t = 4 years.

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Filed Under: Percentage
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Q:

The diploid generation of the plant life cycle always

A) produces eggs and sperm	B) produces spores
C) is called the gametophyte	D) develops from a spore

Answer & Explanation Answer: B) produces spores

Explanation:

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Filed Under: General Science
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Q:

A woman suffered 20% loss on first investment and made 10% profit at second investment and 12 ½% profit on the third investment. If the invested amount be in the ratio of 4 : 5 : 3, find her profit percentage?

A) 0.625%	B) 1.205%
C) 0.987%	D) 0%

Answer & Explanation Answer: A) 0.625%

Explanation:

From the given data,

let the amounts invested be 4p, 5p and 3p

Net profit = Total profit - Total loss

= 10x5p/100 + 25x3p/200 - 20x4p/100

= 0.875p - 0.8p

= 0.075p

Therefore, profit% = (Net profit/Total investment) x 100

= 0.075 x 100/12

= 0.0625%

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Filed Under: Percentage
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Q:

Which is a pair of allotropes?

A) carbon-16 and carbon-12	B) diamond and graphite
C) carbon dioxide and graphite	D) diamond and carbon dioxide

Answer & Explanation Answer: B) diamond and graphite

Explanation:

Allotropes are the different physical forms of an element. Here in the given options, diamond and graphite are the pair of allotropes of carbon.

Some more examples are Molecular oxygen and ozone are pair of allotropes, Black and red phosphorous are also pairs of allotropes.

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Filed Under: Chemistry
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